from collections import deque
def cmp_to_key(a, b):
    return str(a) + str(b) <= str(b) + str(a)

def merge(S, T):
    Q = deque()
    for s in S:
        Q.append(s)
    for t in T[::-1]:
        Q.append(t)
    L = []
    while len(Q) >= 2:
        if cmp_to_key(Q[0], Q[-1]):
            L.append(Q.popleft())
        else:
            L.append(Q.pop())
    L.append(Q.pop())
    return L

def mergeSort(A):
    mid = len(A)//2
    if len(A) <= 1:
        return A
    L, R = A[:mid], A[mid:]
    L = mergeSort(L)
    R = mergeSort(R)
    A = merge(L, R)
    return A

N = int(input())
A = list(map(int, input().split()))
A = mergeSort(A)
ans = 0
mod = 998244353
for a in A:
    ans *= pow(10, len(str(a)), mod)
    ans += a
    ans %= mod
    
print(ans)